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Earth ground problem
A bad fuse has been detected (NOTE: This alarm is stored in the Status Code History)
The gas valve relay was sensed as closed when it should be open
A manual reset is required due to gas valve welded condition being detected more times
than allowed maximum
Low voltage is detected on 24 Vac input
Test Mode
The S9200U1000 is equipped with a Test Mode feature
which allows the control to test and verify several critical
parameters. During Test Mode, the S9200U1000 alters
the selected Safety Timings as described in Table 15.
Table 15. Test Mode Parameters.
Test Mode Parameter
Pre-Purge
HSI Warm-up
Ignition Activation
Flame Recognition
Trial for Ignition
Heat Fan ON Delay
Heat Fan OFF Delay
Post-Purge
Cool Fan ON Delay
Cool Fan OFF Delay
S9200U1000 UNIVERSAL HOT SURFACE IGNITION INTEGRATED FURNACE CONTROL
Table 14. S9200U1000 EnviraCOM™ Alarms. (Continued)
Alarm Description
Modified Timing
5 seconds
17 seconds
3 seconds
1 second
4 seconds
15 seconds
0 seconds
5 seconds
2 seconds
0 seconds
Alarm
Number
88
Display/Diagnostics/EnviraLNK®/TAM
92
Display/Diagnostics/EnviraLNK®/TAM
100
Display/Diagnostics/EnviraLNK®/TAM
124
Display/Diagnostics/EnviraLNK®/TAM
125
Display/Diagnostics/EnviraLNK®/TAM
Test Mode can be accessed several ways:
— Thermostat inputs:
• Apply a Y + G request within 3 seconds after
power-up for 2 seconds.
• Next, remove the Y + G request and apply W
request within 10 seconds.
— EnviraCOM™ command
— The G signal enables the circulator in Test Mode.
If a G request is present, the circulator is con-
trolled as required by the heating or cooling
sequence. If the G request is removed, the circu-
lator turns off during the heating or cooling
sequence. If there is no other thermostat request
present, a G request causes the circulator to be
energized. The circulator energizes during a heat-
ing cycle if the limit switch opens, regardless of
the G signal.
If there is a failure during Test Mode:
• An error code flashes indicating the failure. See
Table 12 on page 20.
• An EnviraCOM™ alarm is active and sent on
the bus. See Table 14 on page 22.
Test Mode is exited after any of the following conditions:
— Three minutes of operation
— Receipt of an EnviraCOM™ command instructing
the S9200U1000 to exit Test Mode
— The cycling of power
23
Comment
69-2075EF—01
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